1 package org.apache.turbine.services.naming;
2
3 /* ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2001 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution,
22 * if any, must include the following acknowledgment:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgment may appear in the software itself,
26 * if and wherever such third-party acknowledgments normally appear.
27 *
28 * 4. The names "Apache" and "Apache Software Foundation" and
29 * "Apache Turbine" must not be used to endorse or promote products
30 * derived from this software without prior written permission. For
31 * written permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * "Apache Turbine", nor may "Apache" appear in their name, without
35 * prior written permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 */
56
57 import java.util.Enumeration;
58 import java.util.Hashtable;
59 import java.util.Iterator;
60 import java.util.Properties;
61 import javax.naming.Context;
62 import javax.naming.InitialContext;
63 import org.apache.turbine.services.InitializationException;
64 import org.apache.turbine.services.TurbineBaseService;
65 import org.apache.turbine.services.resources.TurbineResources;
66 import org.apache.turbine.util.Log;
67 import org.apache.turbine.util.RunData;
68
69 /***
70 * This class is the default implementation of NamingService, which
71 * provides JNDI naming contexts.
72 *
73 * @author <a href="mailto:greg@shwoop.com">Greg Ritter</a>
74 * @author <a href="mailto:colin.chalmers@maxware.nl">Colin Chalmers</a>
75 * @version $Id: TurbineNamingService.java,v 1.2 2002/07/11 16:53:25 mpoeschl Exp $
76 */
77 public class TurbineNamingService extends TurbineBaseService implements NamingService
78 {
79 /***
80 * A global HashTable of Property objects which are initialised using
81 * parameters from the ResourcesFile
82 */
83 private static Hashtable contextPropsList = null;
84
85 /***
86 * Called the first time the Service is used.<br>
87 *
88 */
89 public void init() throws InitializationException
90 {
91 // Context properties are specified in lines in the properties
92 // file that begin with "context.contextname.", allowing
93 // multiple named contexts to be used. Everything after the
94 // "contextname." is the name of the property that will be
95 // used by the InitialContext class to create a new context
96 // instance.
97 try
98 {
99 Iterator contextKeys = TurbineResources.getKeys("context.");
100 contextPropsList = new Hashtable();
101
102 while (contextKeys.hasNext())
103 {
104 String key = (String) contextKeys.next();
105 int start = key.indexOf(".") + 1;
106 int end = key.indexOf(".", start);
107 String contextName = key.substring(start, end);
108 Properties contextProps = null;
109
110 if (contextPropsList.containsKey(contextName))
111 {
112 contextProps = (Properties)
113 contextPropsList.get(contextName);
114 }
115 else
116 {
117 contextProps = new Properties();
118 }
119
120 contextProps.put(
121 key.substring(end + 1),TurbineResources.getString(key));
122
123 contextPropsList.put(contextName, contextProps);
124 }
125
126 setInit(true);
127 }
128 catch (Exception e)
129 {
130 Log.error("Failed to initialize JDNI contexts!", e);
131
132 throw new InitializationException(
133 "Failed to initialize JDNI contexts!");
134 }
135 }
136
137 /***
138 * Places the contexts defined in the TurbineResources instance
139 * (if any) into the data.contexts Hashtable.
140 *
141 * @param data The RunData object for the current request.
142 * @exception InitializationException, if there was a problem
143 * during initialization.
144 */
145 public void init(RunData data) throws InitializationException
146 {
147 try
148 {
149 if (contextPropsList == null)
150 {
151 init();
152 }
153
154 Enumeration contextPropsKeys = contextPropsList.keys();
155 while (contextPropsKeys.hasMoreElements())
156 {
157 String key = (String) contextPropsKeys.nextElement();
158 Properties contextProps =
159 (Properties) contextPropsList.get(key);
160 InitialContext context = new InitialContext(contextProps);
161 data.getJNDIContexts().put(key, context);
162 }
163 }
164 catch (Exception e)
165 {
166 Log.error("Failed to initialize JDNI contexts!",e);
167
168 throw new InitializationException(
169 "Failed to initialize JDNI contexts!");
170 }
171 }
172
173 /***
174 * Return the Context with the specified name. The Context is
175 * constructed using the properties for the context with the
176 * specified name; ie. those properties that start with
177 * "services.servicename.properties.name.".
178 *
179 * @param contextName The name of the context.
180 * @return The context with the specified name, or null if no
181 * context exists with that name.
182 */
183 public Context getContext(String contextName)
184 {
185 // Get just the properties for the context with the specified
186 // name.
187 Properties contextProps = null;
188
189 if (contextPropsList.containsKey(contextName))
190 {
191 contextProps = (Properties) contextPropsList.get(contextName);
192 }
193 else
194 {
195 contextProps = new Properties();
196 }
197
198 // Construct a new context with the properties.
199 try
200 {
201 return new InitialContext(contextProps);
202 }
203 catch (Exception e)
204 {
205 return null;
206 }
207 }
208 }
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